The A250 Aqua Pro 2-in-1 Water Filter is the newest BONECO innovation. This filter not only significantly reduces water hardness， but also acts as a water purifier to filter out harmful substances such as copper， lead， mercury as well as unpleasant odors from your water. The A250 Aqua Pro will last up to 6-months and there is a water test strip included with the filter so each user as a better understanding of how long the filter will last based on their local water hardness. The longer life-cycle of the A250 Aqua Pro helps keep the maintenance costs down while ensuring the best quality of water is being used in your humidifier. Compatible with all BONECO and AIR-O-SWISS Ultrasonic Humidifiers with the exception of the 7146 travel humidifier. Replaces the current 7531 Demineralization Cartridge.

Water demineralization - significant reduction of water hardness

Water purification - filters harmful substances such as copper， lead， mercury and removes odor from water

Includes water test strip to determine your water hardness

Uses: all BONECO ultrasonic humidifiers with the exception of the 7146 travel